[ci] Add hook to clean the Ray address file before the test run starts

python/ray/tests/conftest.py

@@ -1468,6 +1468,15 @@ def random_ascii_file(request):
         yield fp
 
 
+# Clean up Ray address file before the test run starts, since sometimes bazel test times out
+# and kill the test process, without cleaning up the Ray address file.
+def pytest_sessionstart(session):
+    """Called after the Session object has been created and before performing collection and entering the run test loop."""
+
+    # Delete the cluster address file just in case.
+    ray._common.utils.reset_ray_address()
+
+
 """
 pytest httpserver related test fixtures
 """